Grading cylinder



FIG. 1 is a front perspective view of a grading cylinder showing my new design;

FIG. 2 is a top plan view thereof, the bottom plan, front plan and rear plan views being mirror images thereof;

FIG. 3 is an enlarged view of a portion defined by the callout shown in FIG. 2;

FIG. 4 is a cross sectional view of a portion defined by the lines 4-4 shown in FIG. 3;

FIG. 5 is a cross sectional view of a portion defined by the lines 5-5 shown in FIG. 3;

FIG. 6 is a right side view of a grading cylinder, the left side view being a mirror image thereto; and,

FIG. 7 is an enlarged view of a portion defined by the callout shown in FIG. 6. 

CLAIM The ornamental design for a grading cylinder, as shown and described. 